Re: [Devel] OpenType futures

[Werner LEMBERG]

> >I believe that for such special demands it is easiest to write a
> >new ad-hoc parser which only handles vertical glyph substitution.
> 
> So, it's role of the maintainer of CJK text processer?

Yes:

  . Test whether the current font is in SFNT format.
  . Parse the header to get the GSUB table offset.
  . Parse the GSUB table for the `vert' feature (and similar ones),
    ignoring everything else.
  . Extract the mapping table(s) from the lookups which correspond to
    `vert' and friends.


    Werner